Adding NodeJS version 12 env (#1683)

Co-authored-by: Rahul Bhati <rjbhati009@gmail.com>

test/tests/test_environments/node_src/test-case-4/momentExample.js

@@ -0,0 +1,8 @@
+const momentpackage = require("moment");
+
+module.exports = async function (context) {
+  return {
+    status: 200,
+    body: "Hello " + momentpackage().format(),
+  };
+};